package org.example.news.anno;

import jakarta.validation.Constraint;
import jakarta.validation.Payload;
import org.example.news.validation.StateValidation;

import java.lang.annotation.*;

@Documented  //元注解
@Target({ ElementType.FIELD}) //元注解，用在属性上
@Retention(RetentionPolicy.RUNTIME) //元注解，保留到运行阶段
@Constraint(validatedBy = {StateValidation.class}) //指定提供校验规则的类
public @interface State {
    //提供校验失败后的提示信息
    String message() default "state参数的值只能是已发布或者草稿！";
    //指定分组
    Class<?>[] groups() default {};
    //负载，获取到State注解的附加信息
    Class<? extends Payload>[] payload() default {};
}
